This is the 250w halide light bulb replacement. It is single-ended with a GY9.5 Bipin Pre-focus base. It has 17 000LM and a 8 500K color temperature rating. This replacement bulb for Philips MSD 250 is a powerful and cost effective bulb for your stage and studio lighting needs. Like the Philips MSD 250 the ASD 250 is features the fantastic brightness 8 500K color temperature and 3 000 hour life needed to make this lamp a reliable lamp option. Save money while still providing your studio with fantastic lighting and check out the MSD 250 replacement bulb the ASD 250 today. Abbreviation Name MSD250 Base GY9.5 2-Pin Prefocus Bulb Type High Intensity Discharge Bulbs (HID) Color Rendering Index (CRI) 65 Color Temperature (K) 8500K Diameter (in) 1.00 Lamp Finish Clear Maximum Overall Length (in) 4.25 Rated Life (Hours) 3000 Wattage (W) 250W CA Prop 65 Yes CA Prop 65 Material Mercury